2002 Volume 46 Pages 647-652
A numerical model of hillslope erosion was constructed in the present study. A collapse model was newly developed and introduced so as to keep the local slope angle be equaled to or less than the angle of repose at any time in numerical computation. Also the effect of gravity associated with the slope angle in longitudinal and lateral directions on sediment transport rate was considered. The velocity field of sheet flow emerging on the slope was evaluated by solving the shallow water equations numerically with the aid of the CIP method. The numerical analysis was conducted with focussing on the hillslope erosion process, the effect of vegetation on it, and the sediment yield rate.
